com.calcfleet/calculators
REMOTE · CALCFLEET.COM · SCANNED AUG 3
Tested financial & practical calculators as free, no-auth MCP tools for AI agents.
Available components
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score →
Endpoint Security66
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation not fully verified: no authorisation is required to call this server, and 122 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe. See how to fix → View diagnostics → Unverified
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC is configured correctly; the domain's records validate against the full chain to the root. View diagnostics → Pass
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability37
- AI-judged instruction clarity (poor).Fail
- Tool/resource definitions use about 11571 tokens (~94/item across 122 items; 122 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management27
- Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage67
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 0% of tool parameters carry a description.Fail
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Add this component to your MCP client. Where a client-specific snippet is available, pick your client below and copy it straight into your config; otherwise use the connection detail shown.
remote · calcfleet.com
claude mcp add --transport http com-calcfleet-calculators https://calcfleet.com/api/mcp
[mcp_servers.com-calcfleet-calculators] url = "https://calcfleet.com/api/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"com-calcfleet-calculators": {
"type": "remote",
"url": "https://calcfleet.com/api/mcp",
"enabled": true
}
}
} openclaw mcp add com-calcfleet-calculators --url https://calcfleet.com/api/mcp --transport streamable-http
mcp_servers:
com-calcfleet-calculators:
url: "https://calcfleet.com/api/mcp" {
"mcpServers": {
"com-calcfleet-calculators": {
"type": "http",
"url": "https://calcfleet.com/api/mcp"
}
}
} The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 3 Aug 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.
- 1 Aug 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.
- 31 Jul 26 +5
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 29 Jul 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.
- 28 Jul 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.
- 27 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 26 Jul 26 51
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 3 Aug 2026 · Probed https://calcfleet.com/api/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=calcfleet.com | CN=YR2,O=Let's Encrypt,C=US | 4 Jul 2026 | 2 Oct 2026 | RSA 2048 | SHA256-RSA | 5127b5138e2c6e68153385f772ddef18b0a |
| SANs: calcfleet.com | ||||||
| CN=YR2,O=Let's Encrypt,C=US (CA) | CN=Root YR,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | RSA 2048 | SHA256-RSA | 4ebd24947e24d394802d84a52fd5b319 |
| CN=Root YR,O=ISRG,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | RSA 4096 | SHA256-RSA | f24b6d17f9d9ad7cb1c9fea78782699f |
DNSSEC secure
Validation of calcfleet.com. — Secure
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| calcfleet.com. | present | 41476 | 13 | Verified |
| calcfleet.com. | Verified address RRset verified with the apex keys |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=63072000; includeSubDomains; preload |
| x-content-type-options | nosniff |
| x-frame-options | SAMEORIGIN |
| referrer-policy | strict-origin-when-cross-origin |
| permissions-policy | camera=(), microphone=(), geolocation=(), payment=() |
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://calcfleet.com/api/mcp | Verified | 200 | |
| http (plaintext) | http://calcfleet.com/api/mcp | HTTPS enforced | 308 | https://calcfleet.com/api/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability.
required_savings_calculator Required Savings Calculator ~92
Required Savings Calculator — Find the monthly savings needed to reach a goal: three deterministic return scenarios plus an inverse Monte Carlo rate sized for your chosen success odds.
| Name | Type | Req | Description |
|---|---|---|---|
| currentSavings | number | yes | — |
| expectedRealReturnPct | number | yes | — |
| successTargetPct | integer | — | — |
| targetAmount | number | yes | — |
| volatilityPct | number | yes | — |
| years | integer | yes | — |
No output schema declared.
No examples provided.
retirement_monte_carlo_calculator Retirement Monte Carlo Calculator ~117
Retirement Monte Carlo Calculator — Estimate your retirement plan's success probability with 5,000 simulated Monte Carlo market paths, plus a fan chart of percentile balances at every age.
| Name | Type | Req | Description |
|---|---|---|---|
| currentAge | integer | yes | — |
| currentSavings | number | yes | — |
| expectedRealReturnPct | number | yes | — |
| monthlyContribution | number | yes | — |
| monthlyRetirementSpending | number | yes | — |
| planUntilAge | integer | yes | — |
| retireAge | integer | yes | — |
| volatilityPct | number | yes | — |
No output schema declared.
No examples provided.
roas_calculator ROAS & Break-Even ROAS Calculator ~78
ROAS & Break-Even ROAS Calculator — Calculate ROAS and break-even ROAS instantly. Enter revenue, ad spend, and gross margin to see if your campaign is truly profitable — or just spending to spend.
| Name | Type | Req | Description |
|---|---|---|---|
| adSpend | number | yes | — |
| grossMarginPct | number | yes | — |
| revenue | number | yes | — |
No output schema declared.
No examples provided.
roi_calculator ROI Calculator with Annualized Return ~77
ROI Calculator with Annualized Return — Calculate ROI and annualized return on any investment. Add fees and costs to see true net gain and the real annual growth rate behind the headline number.
| Name | Type | Req | Description |
|---|---|---|---|
| additionalCosts | number | yes | — |
| finalValue | number | yes | — |
| initialInvestment | number | yes | — |
| years | number | yes | — |
No output schema declared.
No examples provided.
roth_ira_calculator Roth IRA Growth Calculator ~83
Roth IRA Growth Calculator — See how a Roth IRA grows tax-free. Enter your annual contribution, expected return, and time horizon to project future value, total paid in, and growth.
| Name | Type | Req | Description |
|---|---|---|---|
| annualContribution | number | yes | — |
| annualReturnPct | number | yes | — |
| capitalGainsTaxPct | number | yes | — |
| years | integer | yes | — |
No output schema declared.
No examples provided.
running_pace_calculator Running Pace Calculator with Race Predictions ~85
Running Pace Calculator with Race Predictions — Calculate your per-km and per-mile running pace from any distance and time. Get predicted finish times for 5K, 10K, half marathon, and marathon, plus splits.
| Name | Type | Req | Description |
|---|---|---|---|
| distanceKm | number | yes | — |
| hours | integer | yes | — |
| minutes | integer | yes | — |
| seconds | integer | yes | — |
No output schema declared.
No examples provided.
saas_mrr_growth_calculator SaaS MRR Growth Projection Calculator ~107
SaaS MRR Growth Projection Calculator — Model SaaS MRR growth with monthly compounding: add new revenue, subtract churn, apply expansion. See projected ARR and months to any revenue milestone.
| Name | Type | Req | Description |
|---|---|---|---|
| monthlyChurnPct | number | yes | — |
| monthlyExpansionPct | number | yes | — |
| months | integer | yes | — |
| newMrrPerMonth | number | yes | — |
| startingMrr | number | yes | — |
| targetMrr | number | — | — |
No output schema declared.
No examples provided.
salary_to_hourly_calculator Salary to Hourly Calculator (and Back) ~98
Salary to Hourly Calculator (and Back) — Convert an annual salary to an hourly wage or an hourly rate back to a yearly salary. Set your hours and weeks to see weekly, biweekly, and monthly pay too.
| Name | Type | Req | Description |
|---|---|---|---|
| annualSalary | number | yes | — |
| hourlyRate | number | yes | — |
| hoursPerWeek | number | yes | — |
| mode | string | yes | — |
| weeksPerYear | number | yes | — |
No output schema declared.
No examples provided.
sales_tax_calculator US Sales Tax Calculator (by State) + Reverse ~83
US Sales Tax Calculator (by State) + Reverse — Calculate US sales tax by state. Add or strip tax from any price. Select a state to prefill the rate; all 50 states included. 2025 base rates — local rates vary
| Name | Type | Req | Description |
|---|---|---|---|
| amount | number | yes | — |
| mode | string | yes | — |
| ratePct | number | yes | — |
No output schema declared.
No examples provided.
savings_drawdown_calculator Savings Drawdown Calculator ~70
Savings Drawdown Calculator — See how long your savings will last: enter your balance, monthly withdrawal, and expected return to find the months and years until the money runs out.
| Name | Type | Req | Description |
|---|---|---|---|
| annualReturnPct | number | yes | — |
| monthlyWithdrawal | number | yes | — |
| principal | number | yes | — |
No output schema declared.
No examples provided.
savings_goal_calculator Savings Goal Calculator ~76
Savings Goal Calculator — Calculate the monthly savings you need to reach any goal. Input your target, current balance, annual rate, and years to see your required monthly contribution.
| Name | Type | Req | Description |
|---|---|---|---|
| annualRatePct | number | yes | — |
| currentSavings | number | yes | — |
| goalAmount | number | yes | — |
| years | number | yes | — |
No output schema declared.
No examples provided.
solar_panel_savings_calculator Solar Panel Savings Calculator ~109
Solar Panel Savings Calculator — Estimate how much a rooftop solar system saves on your power bill: enter size, sun hours, cost, and any currently applicable credit to see yearly savings and payback.
| Name | Type | Req | Description |
|---|---|---|---|
| derate | number | yes | — |
| electricityRate | number | yes | — |
| grossCost | number | yes | — |
| horizonYears | integer | yes | — |
| peakSunHours | number | yes | — |
| systemKW | number | yes | — |
| taxCreditPct | number | yes | — |
No output schema declared.
No examples provided.
solar_system_size_calculator Solar System Size Calculator (kW Needed) ~101
Solar System Size Calculator (kW Needed) — Find the solar system size you need: enter yearly kWh usage, peak sun hours, and panel wattage to get the required kW and the number of panels it takes.
| Name | Type | Req | Description |
|---|---|---|---|
| annualUsageKWh | number | yes | — |
| derate | number | yes | — |
| offsetFraction | number | yes | — |
| panelWatts | number | yes | — |
| peakSunHours | number | yes | — |
No output schema declared.
No examples provided.
student_loan_calculator Student Loan Payoff Calculator ~84
Student Loan Payoff Calculator — See exactly how many months until you pay off your student loans, how much extra payments save in interest, and whether refinancing makes financial sense.
| Name | Type | Req | Description |
|---|---|---|---|
| annualRatePct | number | yes | — |
| balance | number | yes | — |
| extraMonthly | number | yes | — |
| monthlyPayment | number | yes | — |
| refinanceRatePct | — | — | — |
No output schema declared.
No examples provided.
take_home_pay_calculator Take-Home Pay Calculator (US) ~70
Take-Home Pay Calculator (US) — Estimate your US take-home pay for 2026. Enter gross salary and filing status to see federal income tax, Social Security, Medicare, and monthly net income.
| Name | Type | Req | Description |
|---|---|---|---|
| filingStatus | string | yes | — |
| grossAnnualSalary | number | yes | — |
No output schema declared.
No examples provided.
tdee_calculator TDEE Calculator: Daily Calorie Needs ~100
TDEE Calculator: Daily Calorie Needs — Calculate your Total Daily Energy Expenditure (TDEE) using the Mifflin-St Jeor formula. Find your daily calorie needs for fat loss, maintenance, or muscle gain.
| Name | Type | Req | Description |
|---|---|---|---|
| activity | string | yes | — |
| age | integer | yes | — |
| goal | string | yes | — |
| heightCm | number | yes | — |
| sex | string | yes | — |
| weightKg | number | yes | — |
No output schema declared.
No examples provided.
tiered_commission_calculator Tiered Commission Calculator (USD) ~138
Tiered Commission Calculator (USD) — Calculate tiered sales commission in USD: a base rate up to a threshold, a higher rate above it, plus any settlement adjustment. See the exact per-tier math. Supports Verifiable Calculation Certificates: pass certify=true to also receive a signed, independently verifiable receipt (DSSE/Ed25519) for this exact calculation.
| Name | Type | Req | Description |
|---|---|---|---|
| adjustmentAmount | number | yes | — |
| certify | boolean | — | — |
| revenue | number | yes | — |
| tier1RatePct | number | yes | — |
| tier2RatePct | number | yes | — |
| tier2ThresholdAmount | number | yes | — |
No output schema declared.
No examples provided.
tile_calculator Tile Calculator (Tiles Needed) ~109
Tile Calculator (Tiles Needed) — Calculate how many floor or wall tiles you need. Enter room size, tile dimensions, and waste percentage to get total tiles, boxes to buy, and material cost.
| Name | Type | Req | Description |
|---|---|---|---|
| lengthFt | number | yes | — |
| pricePerBox | number | yes | — |
| tileHeightIn | number | yes | — |
| tileWidthIn | number | yes | — |
| tilesPerBox | integer | yes | — |
| wastePct | number | yes | — |
| widthFt | number | yes | — |
No output schema declared.
No examples provided.
time_lapse_calculator Time-Lapse Calculator (Interval, Clip, Storage) ~92
Time-Lapse Calculator (Interval, Clip, Storage) — Plan a time-lapse: enter shoot length, shot interval, playback fps, and file size to see how many frames you shoot, your clip length, and storage needed.
| Name | Type | Req | Description |
|---|---|---|---|
| avgFileSizeMB | number | yes | — |
| fps | number | yes | — |
| intervalSeconds | number | yes | — |
| shootDurationSeconds | number | yes | — |
No output schema declared.
No examples provided.
token_counter_calculator Token Counter & Context-Window Fit Calculator ~89
Token Counter & Context-Window Fit Calculator — Estimate the token count of any text with the chars/4 words/0.75 heuristic, check if it fits 8k, 128k, 200k, or 1M context windows, and gauge API cost.
| Name | Type | Req | Description |
|---|---|---|---|
| chars | number | yes | — |
| pricePerMillion | number | yes | — |
| words | number | yes | — |
No output schema declared.
No examples provided.
topsoil_calculator Topsoil Calculator (Yards & Weight) ~87
Topsoil Calculator (Yards & Weight) — Work out how much topsoil you need for a bed, lawn, or garden. Enter area and depth to get cubic yards, cubic feet, weight in tons, and the exact bag count.
| Name | Type | Req | Description |
|---|---|---|---|
| areaSqFt | number | yes | — |
| bagSizeFt3 | number | yes | — |
| depthInches | number | yes | — |
No output schema declared.
No examples provided.
turkey_cooking_time_calculator Turkey Cooking Time & Thaw Calculator ~71
Turkey Cooking Time & Thaw Calculator — Estimate turkey roasting time by weight, plus refrigerator and cold-water thaw times. Stuffed or unstuffed, always cook to 165°F verified with a thermometer.
| Name | Type | Req | Description |
|---|---|---|---|
| minPerLb | number | yes | — |
| weightLbs | number | yes | — |
No output schema declared.
No examples provided.